Audi Q8 vs Porsche Cayenne
A detailed look at how two of Australia's most popular SUVs compare on price, running costs, safety, and everyday livability.
Specifications and pricing correct at time of publishing. Prices are RRP before on-road costs unless stated otherwise. Always confirm with the manufacturer or dealer before purchasing.
Price Breakdown
The Audi Q8 starts from $143,415 before on-road costs, while the Porsche Cayenne opens at $138,800. That makes the Porsche Cayenne the more affordable entry point by $4,615.
Once you factor in stamp duty, registration, CTP insurance, and dealer delivery, expect to add roughly 8-12% on top of the RRP depending on your state. That puts estimated driveaway prices in the ballpark of $157,757 and $152,680 respectively.
Over 5 years, the running costs favour the Audi Q8 by roughly $5,415 in fuel alone.
Safety Rundown
Both the Audi Q8 and Porsche Cayenne hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. The Audi Q8 packs more ADAS features with 9 out of 10 key systems fitted, compared to 7 in the Porsche Cayenne.
Both include the essentials: autonomous emergency braking, lane keep assist, adaptive cruise control, a reversing camera.
Feature Showdown
Both come with modern infotainment systems. Apple CarPlay and Android Auto are standard across both.
The Audi Q8 stands out with wireless Apple CarPlay/Android Auto, wireless charging, ventilated seats, Bang & Olufsen audio and ambient lighting that you will not find on the Porsche Cayenne. The Porsche Cayenne counters with Apple CarPlay and BOSE audio. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Audi Q8 uses a Diesel MHEV producing 210kW and 600Nm of torque, sent through a automatic to a AWD layout. It covers the 0-100km/h sprint in 6.1 seconds.
The Porsche Cayenne responds with a Petrol making 260kW and 500Nm, paired to a 8-speed auto driving all four wheels. It gets to 100km/h in 5.7 seconds.
The Porsche Cayenne has the clear power advantage at 260kW vs 210kW. In the real-world sprint, the Porsche Cayenne is 0.4s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Audi Q8 measures 4,986mm long on a 2,995mm wheelbase, 56mm longer than the Porsche Cayenne at 4,930mm (2,895mm wheelbase). The longer wheelbase on the Audi Q8 generally means more rear legroom.
Boot space is 660L in the Audi Q8 and 698L in the Porsche Cayenne, giving the Porsche Cayenne a 38L advantage.
For towing, the Porsche Cayenne leads with a 3,500kg braked capacity vs 3,500kg. That 0kg difference matters if you regularly hitch up.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
12.5m diameter
Large
Based on 12.5m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Turning circle ratings
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $2,394/year for the Audi Q8 and $3,477/year for the Porsche Cayenne. That is a $1,083 annual difference in favour of the Audi Q8.
Estimated annual total: $2,394 (Audi Q8) vs $3,477 (Porsche Cayenne). The Audi Q8 saves you roughly $1,083 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (Audi Q8) vs 3 years / 999,999km (Porsche Cayenne). The Audi Q8 has longer coverage.
Who Should Buy Which?
Buy the Audi Q8 if: You want lower running costs, value a longer warranty, or prefer Audi's approach to design and ownership experience.
Buy the Porsche Cayenne if: You want the lower entry price, prioritise performance, need more boot space, or prefer Porsche's approach to design and ownership experience.
The Verdict
The Porsche Cayenne takes 4 of 6 key spec categories and comes in at a lower price. The Audi Q8 will save you roughly $1,083 a year in fuel. If boot space matters, the Porsche Cayenne has a clear edge. The Audi Q8 adds peace of mind with a longer 5-year warranty. The best pick depends on what you value most. Explore the full specs for each model below.
Disclaimer: All information in this comparison was believed to be correct at the time of publishing (20 April 2026). Prices are manufacturer recommended retail prices (RRP) and may vary by state, dealer, and options. Driveaway costs include estimated on-road costs for Victoria. Fuel economy figures are WLTP/ADR combined cycle. Specifications can change without notice. Always verify with the manufacturer before making a purchase decision. CarSorted does not accept payment for recommendations.
Published by CarSorted Editorial Team · 20 April 2026
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